Guam's residents cannot vote in the presidential election but the territory, which is less than a fifth of the size of the smallest US state of Rhode Island, sends four pledged delegates and five superdelegates to the Democratic National Convention in August.

The results splits the pledged delegates t between the two candidates.

"We can't vote for president, but this is our part of the process," Robert Lizama, a local mayor, said.

"It's brought a lot of awareness and participation. I think that's important.

'Democrat for a day'

Party officials said many people had registered as Democrats at the caucus sites around the island, prompting the tag "Democrats for a day."